Answer :

Final answer:

White blood cells, or leukocytes, are essential for the immune response against pathogens.


Explanation:

White blood cells, also known as leukocytes, play a vital role in the body's immune response by identifying and targeting pathogens like bacteria and viruses. They are produced from hematopoietic stem cells in the bone marrow and circulate throughout the body in the blood and lymphatic system.


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